The only "code words" here are "racist dialect(ic)." It signifies the beginning of a classification with negative connotatation. It labels and denigrates the "code words" (part of original argument) so that the classifier is free to form a "logical synthesis" (really antithesis).

The fact is there are no 'secret' code words. But it is necessary in counter to destroy the words-representing-concepts (because they can't counter sound concepts).